The reaction of 2,4,6-trimethylbenzonitrile N-oxide with various di- and tetrasubstituted p-benzoquinones and the structures of the products were studied. All of the tetrasubstituted quinones gave dioxazole derivatives through addition at the carbonyl site, whereas the disubstituted quinones gave dioxazoles or isoxazoline derivatives depending on the substituents. The reactivity of the quinone carbonyl toward the nitrile oxide varies with the substituents and with the substitution pattern; this phenomenon is discussed in terms of the resonance and inductive effects of the substituents.
研究了
2,4,6-三甲基苯甲腈N-氧化物与各种二取代和四取代
对苯醌的反应及产物的结构。所有四取代的醌都通过羰基加成形成了二
噁唑衍
生物,而二取代的
苯醌则根据取代基的不同,生成了二
噁唑或
异噁唑啉衍
生物。醌羰基对腈
氧化物的反应活性因取代基及其取代模式的不同而异;这种现象通过取代基的共振和诱导效应进行了讨论。